File:Etacarinae-001.jpg
维基百科,自由的 encyclopedia
原始文件 (1,023 × 1,025像素,文件大小:106 KB,MIME类型:image/jpeg)
摘要
描述Etacarinae-001.jpg |
(NASA News Release) A NASA Hubble Space Telescope "natural color" image of the material surrounding the star Eta Carinae, as imaged by the Wide Field Planetary Camera 2 (WFPC-2). The Camera was installed in the Hubble Space Telescope during the STS-61 Hubble Servicing Mission. The WFPC-2 optically corrects for the aberration of the telescope's primary minor, restoring the telescope's vision to its originally planned clarity. Eta Carinae has a mass of approximately 150 times that of the sun, and is about 4 million times brighter than our local star, making it one of the most massive and most luminous stars known. Eta Carinae is highly unstable, and prone to violent outbursts. The last of these occurred in 1841, when despite it's distance (over 10,000 light years away) Eta carinac briefly became the second brightest star in the sky. Pre-servicing mission HST observations taken with the WF/PC-1 reveled new detail in the rapidly expanding shell of material which was ejected during the last century's outburst. However, the earlier effects of HST's spherical aberration obscured the structure of the material very near Eta Carinae itself. The clear view of Eta Carinae now provided by WFPC-2 dramatically demonstrates the ability of HST to reliable study faint structures near bright objects. The picture is a combination of three different images taken in red, green, and blue light. The ghostly red outer glow surrounding the star is composed of the very fastest moving of the material which was ejected during the last century's outburst. This material, much of which is moving more than two million miles per hour, is largely composed of nitrogen and other elements formed in the interior of the massive stir, and subsequently ejected into interstellar space. The bright blue-white nebulosity closer in to the star also consists of ejected stellar material. Unlike the outer nebulosity, this material is very dusty and reflects starlight. The new data show that this structure consists of two lobes of material, one of which (lower left) is moving toward us and the other of which (upper right) is moving away. The knots of ejected material have sizes comparable to that of our solar system. Previous models of such bipolar flows predict a dense disk surrounding the star which funnels the ejected material out of the poles of the system. In Eta Carinae, however, high velocity material is spraying out in the same plane as the hypothetical disk, which is supposed to be channeling the flow. This is quite unexpected. The WFPC-2 observations of Eta carinie liaise as inany questions as they answer. |
日期 | January 14, 1994 (release) |
来源 | Hubble Site [1] |
作者 | J. Hester/Arizona state University & NASA Hubble Space Telescope |
其他版本 |
Public domainPublic domainfalsefalse |
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use. The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org. For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag. |
date/time | username | edit summary |
---|---|---|
17:26, 6. Jul 2004 | Deconstruct | (Quellenhinweis und Beschreibung) |
17:12, 6. Jul 2004 | Deconstruct | (Eta Carinae) |
文件历史
点击某个日期/时间查看对应时刻的文件。
日期/时间 | 缩略图 | 大小 | 用户 | 备注 | |
---|---|---|---|---|---|
当前 | 2008年5月1日 (四) 14:21 | 1,023 × 1,025(106 KB) | Vol de nuit | Higher resolution | |
2006年3月15日 (三) 20:39 | 479 × 480(23 KB) | Crux | This image was copied from wikipedia:de. The original description was: {| border="0" cellpadding="1" cellspacing="1" valign="top" | <!-- Bildbeschreibung --> | valign="top" | ''' Beschreibung: ''' || Dieses Bild des Stern [[Eta Carinae] |
文件用途
没有页面使用本文件。
全域文件用途
以下其他wiki使用此文件:
- ca.wikipedia.org上的用途
- es.wikipedia.org上的用途
- fi.wikipedia.org上的用途
元数据
此文件中包含有扩展的信息。这些信息可能是由数码相机或扫描仪在创建或数字化过程中所添加。
如果此文件的源文件已经被修改,一些信息在修改后的文件中将不能完全反映出来。
_error | 0 |
---|